We investigate the role of limited access to airport facilities as a determinant of the hub premium in the US airline industry. We use original data from competition plans that airports are required to submit to the Department of Transportation in compliance with the Aviation Investment and...

The federal government now confronts considerable political pressure to add CO2 to the existing set of criteria air pollutants. As with current criteria pollutants, proposals call for control of CO2, assuming that the control of the each of the three criteria pollutants is separable from the...

We examine the effect of plant managers on productivity using unique matched manager-plant panel data on US auto assembly plants during 1993-2007. Our econometric approach is two-pronged. Our first approach relies on using the panel nature of our data to measure variation in productivity due to...

We analyze subscriber usage data from an Internet Service Provider that sells service using three-part tariff and unlimited plans. Subscribers facing three-part tariffs have lower average usage than subscribers on unlimited plans, and differences among heavy users explain nearly all the overall...